Pneumatically-operated horn



Dec'w 27, 1927. 1,654,454

` L. CHOLLET PNEUMATICALLY OPERATED HORN Filed Feb. 1. 1926 by C may; f

Patented Dec. 27, 1927.

UNITED STATES PATENT OFFICE.

LOUIS CHOLLET, OF PARIS, FRANCE, ASSIGNOR T0 COMPAGNIE INDUSTRIELLE ET COMMERCIALE DU CYCLE ET DE LAD'TOMOBILE, OF PARIS, FRANCE.

PNEUMATIoALLY-OPERATED HORN.

Application led February 1, 1926, Serial No. 85,309, and in France April 6, 1924.

The present invention relates to improvements in pneumatically operated horns of the type described in copending application Serial No. 7,566 filed Feb. 9, 1925, and aims to simplify and perfect the construction and operation of such devices. v

The various novel features of the invention are illustrated in the accompanying drawing in which Figure 1 is a partial longitudinal section through the horn.

Figure 2 is a plan taken on line :1a-.

Figure 3 is a plan taken on the lines y-jz/ in the direction of the arrows.

The horn consists of a bulb P connected to conduit 1, which terminates in a cover member designed to screw onto body portion 3 having prolongations 6 and 7 cooperating with the flared horn portion 8. Part 6 is screwed onto la suitable mounting on the automobile. Member 2 constituting an air outlet tube extends into body portion 3 and thus reduces its capacity.

Near the bottom of the inner portion of member 3 there is provided an annular shoulder portion 14 cut so asv to `have a slightly reentrant angle. Membrane 15 is supported by arms 15 on shoulder 14.'

Arms 15 are formed by portion 15 cut out of the periphery of the membrane 15, sai-d cut out portions forming passages for air to the bottom of the membrane.. Mem` project inwardly slightly below the level of shoulder 14 so that it does not touch membrane 15. It will be seen that in the apparatus, as thus designed, the volume of the vibrating Vair chambers immediately above and belowmembrane 15 is quite small.

In operation, air from bulb P or other suitable source passes through conduit 1 into the small air chamber formed by cover 2, traverses holes 20 and passes under the membrane 15 through passages 15". The streamsl of air passing to both sides of the membrane vibrates this member in the manner described in copending application Serial No. 7,566. 1

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A device of the class described comprising in combination an air supply conduit, an air chamber communicating therewith, a partition dividing said chamberinto two compartments, said partition comprising a circular membrane having peripheral recesses therein and an air distributing disc coacting withsaid membrane and having perforations concentric with the oriiices in the membrane, and an air outlet tube communieating with the air chamber.

2. A device ofthe class described comprising in combination a hollow cover member having an annular internal shoulder therein, a hollow body member coacting with the hollow member and having an annular internal shoulder therein, a circular membrane having peripheral recesses therein, an air distributing disc having a concave face and having perforations therein concentric with the recesses in the membrane, means for clamping said membrane and said air distributing .disc'between the annular internal shoulders of the body and of the cover mem-` ber respectively, and an air outlet tube communicating with the hollow body member.

In testimony whereof I affix my signature.

LOUIS CHOLLET.

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